Heat exchange apparatus



April 1, 1952 J. A. Jos-r ET AL" HEAT EXCHANGE APPARATUS J. A. .n os-rx-:TAL l HEAT EXCHANGEAPPARATUS original Filed Feb. 24, 194s April 1,1952 `2,590,866 f 3 Sheets-Sheet 2 49 l I I I 5/ 50 INVENTORS /5 .Tomy At7057' 6/ y M 62 AT'roR EY April 1L, 1952 J. A. .losT ETAL HEAT EXCHANGEAPPARATUS 3 Sheets-Sheet 3- Original Filed'F'eb. 24, 1943 ORS . INVENTJin/wv A. 1057' ,f Eon/Alep ATTORNEY Patented pr. 1, 1952 HEA'l`EXCHANGE APPARATUS John A. Jost, Westfield, and EdwardV Vogt, Elizabeth,N. J., assignors to Foster Wheeler Corporation, New York, N. Y., acorporation of New York Continuation of abandoned application Serial No.476,880, February 24, 1943. This application April 14, 1948, Serial No.22,796

5 Claims. l

This invention relates to heat exchange apparatus, particularly of theshell and tube type.

The invention provides novel heat exchange apparatus which is compact,is useful for high pressure work although not limited thereto, and iscapable of being quickly and easily cleaned.

The invention will be understood from the following description whenconsidered in connection with the accompanying drawings forming a partthereof, and in which:

Fig. l is an elevational View with parts in section, of a floating headheat exchanger embodying the invention;

Fig. 2 is an elevational view of the left hand end of the device, asviewed in Fig. 1;

Fig. 3 is an elevational view of the right hand end of the device, asviewed in Fig. 1;

Figs. 4, 5, 6, 7, and 8 are sectional views taken respectively on lines9 4, 5 5, 6 6, 1 1, and 8 8 of Fig. l;

Fig. 9 is a horizontal sectional view of the left hand end portion ofthe device, as viewed in Fig. l and taken on line 9 9 of Fig. l;

Fig. 10 is a sectional view taken on line I0 I0 of Fig. 6, and

Fig. l1 is an elevational view with parts in section, of a heat exchangedevice embodying the invention and having fixed tube sheets.

Like characters of reference refer to the same or to similar partsthroughout the several views.

Referring to Figs. 1 to l0 of the drawings, the heat exchanger includesa cylindrical shell I having a flange II at one end, to which isdetachably secured a xed tube sheet I2, and a lioating head at the otherend comprising a movable Atube sheet I3 and a cylindrical extension I4of an outside diameter slightly smaller than the inside diameter of theshell I0, to permit the extension lIII to move axially within the shelltoward and from the fixed tube sheet I2. A plurality of tubes I5 extendthrough the shell between the xed and movable tube sheets I2 and I3. Toprevent leakage between the shell and the extension I4 of the floatinghead, a packing gland is provided which comprises an annulus I6 weldedto the end ofthe shell I0 and which has an inwardly projecting flangeI'I in sldable engagement with the outer periphery of the extension I4of the floating head. The packing I8 is disposed between'the annulus I5and the extension I4, and the packing is retained in position by anadjusting ring I9 having a lateral flange 20 which is movable inthespace between the annulus I6 and the extension I4. Pressure on thepacking is adjusted by turning nuts 2i on bolts 22. Fluid is introducedinto the shell through an inlet nozzle 23 and is withdrawn from theshell through on outlet nozzle 24. If desired, the flow of fluid throughthe shell may be reversed and it may be introduced through nozzle 2liand withdrawn through nozzle 23. The shell is provided with a wrapperbaille 25 which confines the flow of fiuid in the shell substantially tothe space occupied by the tubes I5. A plurality of spaced baffles 26causes the fluid in the shell to flow in a tortuous path over the tubestherein. The shell is provided with a vent 2l and with a drain 28.

In the embodiment of the invention selected for illustration in Figs. 1to l0, the tubes I5 are connected at their ends to provide for the flowof iiuid through the tubes serially, with each tube providing a singlepass through the heat exchanger. The return connections at the fixedtube sheet end of the heat exchanger, as well as the inlet and outlettube connections, are provided by a channel member 29, and the returnconnections at the floating tube sheet end are provided by a channelmember 30. Channel member 29 has an inlet nozzle 3l and an outlet nozzse32 which extend from the annular` periphery of the member. The inletnozzle connects with one end of a curved passage 33 in the channelmember 29 the other end of whirh connects with the tube I9 constitutingthe rst pass through the exchanger. Outlet nozzle 32 similarlycommunicates with a curved passage 34 which also connects with the tubeproviding the last pass through the exchanger. Channel member 29 isprovided with a plurality of return channels 35 which are arranged anddisposed to connect the ends of adjacent tubes to provide for seriesflow of the fluid through the tubes in the shell, as indicated in Fig.4. Channel member 30 is similarly provided with a plurality of returnchannels 36, Figs. 8 and 9, which connect the ends of adjacent tubes atthe oating head ends thereof to provide for series flow of the fluidthrough the tubes.

The channel members 29 and 30 are detachably secured to the fixed andfloating tube sheets respectively, by means which permit the channelmembers to be removed and replaced readily. As shown, such retainingmeans' comprises a cover 3l for the fixed tube sheet channel member 29,f

which is removably secured to the shell I0. The cover 3l is providedwith laterally and inwardly extending arms 38 and 39, Figs. 3, 4 and 5,the inner portions of which are adapted to be received between spacedknuckles 40 and 4I re- 3 spectively, which are secured to opposite sidesof the langed portion of the shell I0. The registering parts of the armsand knuckles have registering apertures through which a hinge pin 42passes, to removably secure the cover 31 to the shell I with the channelmember 29 between the fixed tube sheet I2 and the cover. Cover 31 isprovided with a plurality of set screws 44, the inner ends of whichengage the outer face of the channel member 29. Tightening of these setscrews when the cover member 31 is in position on the shell, will forcethe channel member 29 against the tube sheet I2 or a gasket thereon andwill seal the return connections between the tubes I5. A plurality ofbolts 45 extend through the cover 31 and thread into the channel member29 to secure the channel member to the cover member so that the formermay be swung to open position and returned to closed positionsimultaneously with the cover member. It will be understood that when itis desired to remove the channel and cover members, one of the pins 42may be removed and the channel and cover members may be swung about theother pin 42 as a hinge to open position, or if desired, both pins 42may be removed and the channel and cover members may be removed entirelyfrom the shell.

At the floating tube sheet end of the heat exchanger, the channel member30 is held in position by a cover member 46, like cover member 31, andhaving laterally and inwardly extending arms 48 and 49 at opposite sidesthereof, the inner ends of which are disposed between spaced knuckles 50and 5I and are secured thereto by pins 53 which extend throughregistering apertures in the arms and knuckles. The cover member 46 isprovided with a plurality of set screws 54 to force the channel memberagainst the gasket 55 and the floating tube sheet I3, and a plurality ofbolts 56 to fasten the channel member to the cover member. However, topermit the tube bundle to be withdrawn from the shell through the righthand end thereof, as viewed in Fig. 1, the knuckles 50 and 5I aresecured to a hinge ring 51 which is detachably secured to the floatingtube sheet I3. Referring particularly to Figs. 9 and 10, the annularperiphery of the lloating tube sheet I3 is provided With an annularrecess 58 which receives an inwardly extending annular flange of a splitring 59 which overlies the outer end portion of the oating tube sheetI3. The hinge ring 51 has a groove 60 in the outer part of its innerperipheral portion to-receive the split ring, as shown particularly wellin Fig. 9. To insure the correct n positioning of the hinge ring 51 onthe tube sheet and to prevent rotation of the ring, the tube sheet andhinge ring are provided with diametrically opposed keyways, each ofwhich receives a key 6I which is retained in position by a set screw 62threaded in the hinge ring. With this arrangement, the cover member 46and the channel member 30 maybe removed and replaced in the mannerdescribed in connection with the corresponding parts at the opposite endof the heat exchanger, and the hinge ring may be removed from thefloating tube sheet by loosening the set screws 62, sliding the hingering toward the opposite end of the heat exchanger to an extent whichwill permit the removal of the split ring 59, after which the hinge ringmay be withdrawn from the tube sheet. To return the hinge ring tooperative position, it is placed on the tube sheet I3 and is moved to aposition which will permit the insertion of the keys 6I in theirkeyways, assuming they have been removed previously, and the insertionof the split ring, after which the hinge ring is moved into operativeposition with the keys 6I in their keyways, and the set screws 62 aretightened.

The form of the invention shown in Fig. l1, is similar to the form shownin Figs. 1 to l0. excepting that the tube sheets are xed at both endsand an expansion joint is employed in lieu 'of a packing gland. In Fig.1l, the tube sheet 63 has a cylindrical extension- 64 which is providedwith a flange 65 of sufliciently large diameter to receive within it theend of the shell I0. The llange 65 is secured to one end of an expansionjoint 66, the other end being xed to a member 61 which is welded to theouter wall of the shell I0. A channel member 68 having a plurality ofchannels similar to the channels 36, is held in position against thetube sheet, or a gasket on the tube sheet, by a cover member 69 similarto the cover member 46, and which is provided with a plurality of setscrews 10. The cover member 69 is detachably secured to the shell I0through laterally and inwardly extending arms 1I which are receivedbetween spaced knuckles 12 on the shell. A pin 13 passes throughIregistering apertures in each of the arm and knuckle groups at eachside of the tube sheet and retains the cover plate in position. Thecover plate and channel member are removed and replaced in the mannerpreviously described in connection with the removal and replacement ofthe channel member 29 and cover plate 31.

From the foregoing it will be perceived that heat exchangers embodyingthe invention are compact, and that the tubes and the parts associatedwith the tubes, as Well as other parts of the exchangers, are readilyaccessible for cleaning and repair.

The present application is a continuation of application Serial No.476,880 led February 24, 1943, now abandoned.

Since changes may be made in the form, location and relative arrangementof the several parts of the apparatus disclosed without departing fromthe principles of the invention, it will be understood that theinvention is not to be limited excepting by the `scope of the appendedclaims. n

What is claimed is:

1. Heat exchange apparatus comprising a. shell, tube sheets, tubesextending between the tube sheets, a channel member associated with atube sheet and having a channel therein communicating with the ends of aplurality of tubes to provide a return connection for the tubes, a covermember adapted to be positioned on the outer side of the channel member,a removable ring for the outside of the shell, a split ring engaging thercmovable ring and the shell for removably attaching the removable ringto the shell, key means lfor the removable ring to retain it in 'proper-position on the shell, means for removably connecting the cover memberto the removable ring, and means for forcing the channel member towardthe tube sheet with which it is associated.

2. Heat exchange apparatus comprising a shell having a groove thereinadjacent one end thereof, tube sheets, tubes extending between the tubesheets, a channel member associated with a tube sheet and having achannel therein communicating with the ends of a plurality of tubes toprovide a return connection for the tubes, a cover member adapted to bepositioned on the outer side of the channel member, a removable ring forthe outside of the shell, a split ring engaging the groove in the shelland extending above the surface ofthe shell for removably attaching theremovable ring to the shell, the removable ring having engaging meansadapted to engage the portion of the split ring extending above thesurface of the shell on the side of said split ring furthest from saidone end of the shell, knuckles on the removable ring, each knucklehaving an extension with an aperture therein, which extension projectstoward the cover member, positioning means for insuring the properposition of the channel member in relation to said end of the tubes,apertured arms on the cover member extending toward extensions on theknuckles on the removable ring, pins passing through the apertures inthe extensions on the knuckles, arms for removably connecting the covermember to the removable ring, said extensions and said arms being of alength to form a space between the cover member and the adjacent tubesheet in which space the channel member is disposed, set screws carriedby the cover member and adapted to engage the channel member for forcingthe latter toward the tube sheet and for drawing the engaging means intotight engagement with the split ring and the split ring into tightengagement with said groove when the tube sheet and channel member arein engagement, and threaded members for detachably securing the channeland cover members together.

3. Heat exchange apparatus comprising a shell, tube sheets adjacentopposite ends of the shell and closing said shell in a fluid-tightmanner, tubes extending between the tube sheets, a channel memberassociated with a tube sheet and having a channel therein communicatingwith the ends of a plurality of tubes to provide a return connection forthe tubes, a cover member outside the shell adapted to be positioned onthe outer side of the channel member and substantially coextensivetherewith, a separate removable ring for the outside of the shell, meansfor re movably attaching the ring to the shell, means for connecting thecover member to the removable ring, and a plurality of set screwscarried by the cover member in an area substantially coextensive withsaid channel member, said set screws being so spaced from one anotherthroughout said area that the set screws exert a force on the channelmember which forces said member throughout its area toward and intoengagement with the tube sheet.

4. Heat exchange apparatus comprising a shell, y

adapted to engage the split ring along the side thereof toward the covermember and the re movable ring, having other engaging means adapted toengage the split ring along the side of the split ring opposite saidside toward the cover, means for removably connecting the cover memberto the removable ring, and means cooperating with the cover means andthe channel for forcing the channel member toward the tube sheet withwhich it is associated and for drawing said engaging means and saidother engaging means into Itight engagement with said side and saidopposite side of the split ring when the tube sheet and channel memberare in engagement.

5. Heat exchange apparatus comprising a shell, tube sheets, tubesextending between the tube sheets, a channel member associated with atube sheet and having a channel therein communicating with the ends of aplurality of tubes to provide a return connection for the tubes, a covermember adapted to be positioned onthe outer side of the channel member,a removable ring for the outside of the shell, a split ring mounted onthe shell for removably attaching the removable ring to the shell, theshell having engaging means adapted to engage the split ring along theside thereof toward the cover member and the removable ring having otherengaging means adapted'to engage the split ring along the side of thesplit ring opposite said side toward the cover, knuckles havingapertures on the removable ring, apertured arms on the cover member,pins passing through the apertures in the knucklesv and arms forhingedly connecting the cover member to the ring, and means cooperatingwith the cover means and the channel for forcing the channel membertoward the tube sheet with which it is associated and for drawing saidengaging means and said other engaging means into tight engagement withsaid side and said opposite side of the split ring when the tube sheetand lchannel member are in engagement.

JOHN A. J OST. EDWARD VOGT.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,120,121 Behringer Dec. 8, 19141,272,232 Davis July 9, 1918 1,678,027 Wagner July 24, 1928 1,739;018Shipley Dec. 10, 1929 1,832,423 Prollus Nov. 17, 1931 1,869,661Heimberger July 26, 1932 2,223,320 Jacocks Nov. 26, 1940 2,254,189 ReedAug. 26, 1941 FOREIGN PATENTS Number Country Date 341,804 France June21, 1924

